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    LevelDescriptionTitleDateArchive NumberLevelItemDescriptionPermatrace map of North Western Europe incl. UK, with arrows, probably depicting the distribution of product from Welsh colleriesTitleCWC_01_01_36 - RCAHMW Collieries Publication CollectionDate1994 to 1995Archive Number6418977LevelItemDescriptionPictoral graph showing the decline in the number of collieries between 1948-1994TitleCWC_01_01_23 - RCAHMW Collieries Publication CollectionDate1994 to 1995Archive Number6418964LevelItemDescriptionDiagrams and captions titled 'Preliminary coal grading' in a set of permatraces about the processing of coalTitleCWC_01_01_07 - RCAHMW Collieries Publication CollectionDate1994 to 1995Archive Number6418912LevelItemDescriptionMeasured schematic of (probably) the surface features of an unknown colliery siteTitleCWC_01_01_17 - RCAHMW Collieries Publication CollectionDate1994 to 1995Archive Number6418942LevelItemDescriptionDraft pictoral graph showing the decline in the number of collieries between 1948-1994TitleCWC_01_01_21 - RCAHMW Collieries Publication CollectionDate1994 to 1995Archive Number6418962LevelItemDescriptionDiagrams and captions titled 'Preparation of treated coal for market' in a set of permatraces about the processing of coalTitleCWC_01_01_11 - RCAHMW Collieries Publication CollectionDate1994 to 1995Archive Number6418916LevelItemDescriptionDiagrams and captions with the subtitles 'Clean coal', 'Light middlings', 'Heavy middlings and shale' in a set of permatraces about the processing of coalTitleCWC_01_01_09 - RCAHMW Collieries Publication CollectionDate1994 to 1995Archive Number6418914LevelItemDescriptionPermatrace map of Wales and larger map of South Wales marking collieries, with a number key. As published on p. 6 of Collieries of Wales: Engineering & Architecture by S. Hughes et alTitleRCAHMW Collieries Publication CollectionDate1994 to 1995Archive Number6419003LevelItemDescriptionPermatrace map of South Wales showing Swansea, Cardiff and Newport and marking collieries, similar to the drawing published on p. 6 of Collieries of Wales: Engineering & Architecture by S. Hughes et alTitleCWC_01_01_41 - RCAHMW Collieries Publication CollectionDate1994 to 1995Archive Number6419002LevelItemDescriptionDiagrams and captions titled 'Raw coal treatment (washing)' in a set of permatraces about the processing of coalTitleCWC_01_01_08 - RCAHMW Collieries Publication CollectionDate1994 to 1995Archive Number6418913